refactor: 重构服务层和仓库层

pkg/storage/minio.go

@@ -3,6 +3,9 @@ package storage
 import (
 	"context"
 	"fmt"
+	"io"
+	"net/url"
+	"strings"
 	"time"
 
 	"carrotskin/pkg/config"
@@ -137,3 +140,64 @@ func (s *StorageClient) BuildFileURL(bucketName, objectName string) string {
 func (s *StorageClient) GetPublicURL() string {
 	return s.publicURL
 }
+
+// ObjectInfo 对象信息
+type ObjectInfo struct {
+	Size         int64
+	LastModified time.Time
+	ContentType  string
+	ETag         string
+}
+
+// GetObject 获取对象内容和信息
+func (s *StorageClient) GetObject(ctx context.Context, bucketName, objectName string) (io.ReadCloser, *ObjectInfo, error) {
+	obj, err := s.client.GetObject(ctx, bucketName, objectName, minio.GetObjectOptions{})
+	if err != nil {
+		return nil, nil, fmt.Errorf("获取对象失败: %w", err)
+	}
+
+	stat, err := obj.Stat()
+	if err != nil {
+		obj.Close()
+		return nil, nil, fmt.Errorf("获取对象信息失败: %w", err)
+	}
+
+	info := &ObjectInfo{
+		Size:         stat.Size,
+		LastModified: stat.LastModified,
+		ContentType:  stat.ContentType,
+		ETag:         stat.ETag,
+	}
+
+	return obj, info, nil
+}
+
+// ParseFileURL 从文件URL中解析出bucket和objectName
+// URL格式: {publicURL}/{bucket}/{objectName}
+func (s *StorageClient) ParseFileURL(fileURL string) (bucket, objectName string, err error) {
+	// 移除 publicURL 前缀
+	if !strings.HasPrefix(fileURL, s.publicURL) {
+		return "", "", fmt.Errorf("URL格式不正确，必须以 %s 开头", s.publicURL)
+	}
+
+	// 移除 publicURL 前缀和开头的 /
+	path := strings.TrimPrefix(fileURL, s.publicURL)
+	path = strings.TrimPrefix(path, "/")
+
+	// 解析路径
+	parts := strings.SplitN(path, "/", 2)
+	if len(parts) < 2 {
+		return "", "", fmt.Errorf("URL格式不正确，无法解析bucket和objectName")
+	}
+
+	bucket = parts[0]
+	objectName = parts[1]
+
+	// URL解码 objectName
+	decoded, err := url.PathUnescape(objectName)
+	if err == nil {
+		objectName = decoded
+	}
+
+	return bucket, objectName, nil
+}